ellerbeck



Jan. 8, 1957 g, ELLERBECK 2,776,795

EXTENDED TENS TRANSFER CONTROL MECHANISM Filed July 27, 1953 2Sheets-Sheet l Jan. 8, 1957 a. c. ELLERBECK 2,776,795

EXTENDED TENS TRANSFER CONTROL MECHANISM Filed July 27, 1953 2Sheets-Sheet 2 United States Patent EXTENDED TENS TRANSFER CONTROLMECHANISM Grant C. Ellerbeck, San Leandro, Calif., assignor to FndenCalculating Machine Co., Inc., a corporation of California ApplicationJuly 27, 1953, Serial N15. 370,269

8 Claims. Cl. 235-43 This invention relates to an improvement for anauxiliary tens-transfer mechanism of the gear train type, such asillustrated by the patent to Machado et al. No. 2,597,507.

A primary object of the present invention is to provide an automaticcentralizing device for the outboard orders of an auxiliarytens-transfer mechanism of the type described in said patent, therebyavoiding errors due to accumulated inaccuracies in the gear trainresulting in overthrow or loss of a carry in the outboard orders.

Another object of the present invention is to provide a centralizingmechanism for the outboard orders of the register dials which isoperative only when the actuators are engaged with the accumulatordials.

Another object of the present invention is to provide an auxiliary, orfull, tens-transfer mechanism of the gear train type, such asillustrated in the aforementioned patent, in which the very exacttolerances 'in the gear train required in that form of transfer may beavoided.

It is conventional in commercial calculating machines, to utilize akeyboard having a capacity of eight or ten orders and an accumulatorregister having about twenty orders for the accumulation of values. Insome commercial machines the respective orders of the accumulator areinterconnected by planetary, or crawl-type, tenstransfer mechanismswhich effect a full carry throughout the width of the accumulator. Othercalculators, such as the commercial machine utilizing the gear traintype of auxiliary carry illustrated in the above-mentioned patent, havecyclically operable, power driven tens-transfer mechanisms on theinboard orders of the machine.

In such machines the passage of a register dial between the 0 and 9positions, either additively or subtrac-. tively, sets a transfer gearin the next higher order of the machine in line with a single toothtens-transfer actuator,

the latter being power driven in timed relation to the actuatingmechanism. Such a direct, power-driven transfer terminates adjacent thehighest order of the keyboard: in the Friden machine with which theabove-mentioned patent is related, in the 12th order for a ten-orderkeyboard. In the patent above-mentioned the higher orders of theregister are provided with an auxiliary tens-transfer mechanism whichincludes a single tooth gear on each of the accumulator dial shafts,which gear engages an idler as the dial passes between the "0 to 9positions. The idler gear in turn is meshable with a gear on the nexthigher order dial shaft, so that when the dial of the lower order passesbetween the 0 and 9 position, the next higher dial is moved a singlestep in the same direction. This train of gears is continued throughoutthe outboard orders of the register, i. e., from the 13th to the 20thorders in a twenty-order register. It is obvious that a train of gearingof this extent must be very ac-, curately manufactured and very closelyadjusted in order to insure the complete carry order of a unit from the12th order of the register to the 20th order thereof, and the problembecomes worse with wear on the various portions of the gear train. Ihave found that the exupper end of the shaft. The accumulator dials andshafts Patented Jan. a, test treme accuracy required in the full carry,or auxiliary tens-transfer, mechanism of the said patent can be avoided,and all of the gears and other parts associated therewith can bemanufactured on the basis of ordinary tolerances, if means is providedfor centralizing the dial approximately half way between the 12th and20th order in a full-cycle position, every time the auxiliarytens-transfer mechanism is operated. Even when such gears are made withconsiderable sloppiness the 4th outboard order dial will be moved atleast a half step (18), so that a centralizer at that order will beeffective to move that gear a full step, but no more, and thus properlycentralize the higher order gears as well. Thus, my invention relates toan improvement in the transfer mechanism of the patent above-mentioned,utilizing an automatic power-operated centralizing mechanism in the 16thor 17th orders of the register. I have found that gear trainsmanufactured according to usual standards will be effective to cause atens-transfer for four orders, without losing it or withoutoverthrowing, and if the intermediate dial is then centralizedaccurately in the full-cycle position, then the higher order dials arealso held in accurate registration. Thus, a primary object of myinvention is to provide an improved centralizing device for anintermediate outboard order of the register.

The present invention is concerned with these and other objects whichwill become apparent from the fol: lowing description of the preferredembodiment of the invention, which is shown in the accompanying drawingsin which:

Fig. 1 is a plan view of a more simple form of my invention.

Fig. 2 is a left end view of the mechanism of the first form of myinvention, such as taken along a vertical plane indicated by the line 22of Fig. 1.

Fig. 3 is a front view of the check arm of the first form of mymechanism, such. as a view taken along the plane indicated by the line3-3 of Fig. 2.

Fig. 4 is a front view of the power-operated mechanism of the secondform, and preferred embodiment, of my invention utilizing the mechanismshown in Figs. 1 and 2, and substituting a power-operated mechanism forthe devices shown in Fig. 3, being in effect a transverse vertical planeview such as taken along the line 3-3 of Fig. 2.

My invention is shown,for purposes of illustration, as

embodied in a calculating machine of the kind describedin the patent toFriden No. 2,229,889as modified by the auxiliary tens-transfer mechanismof the patent to Machado et al. No. 2,597,507 above mentioned. The.

bar 11 and includes substantially vertical accumulator shafts 15rotatably journalled therein. An accumulator gear 16 is aiiixed to thelower end of the dial shaft 15 and an accumulator dial, not shown, ismounted on the are driven by plus or minus gears 22 and 23,respectively, carried by a digitation control spool 21 that is slidablybut monrotatably mounted on a square shaft 20, the

lever 41 is rotatably mounted on the lower face of the framebarll, andis rocked by the passage of the cam 40 between the O and 9" positions,in either directionof rotation. The transfer lever 41 is provided with adownardly extending car 42 which lies between a pair of flanges 43mounted on the hub of a transfer gear 44, which is also slidably butnonrotatably mounted on the square shaft 20. Thus, when the accumulatordial and shaft 15 passes between the and 9 positions, in eitherdirection of rotation, the transfer lever 41 is rocked to translate thetransfer gear 44 and associated flanges 43 forwardly on the square shaft20. In this position the gear 44 is engaged by a single tooth transferactuator gear (not shown), after which the transfer mechanism isreturned to its normal position. This main transfer mechanism, beingoperated from the actuator shafts 31 (shown in Fig. 4) extends onlythrough the inboard orders of the machine, which in the machine of saidpatents comprises a ten-order keyboard and ordinally associatedactuators, and an additional actuator shaft 31 serving the 11th and 12thorders of the register. These transfer mechanisms can be referred to asthe inboard, or main, transfer mechanisms and are effective throughoutthe orders of the carriage aligned with the ten orders of the actuatorsand two additional orders.

In order to extend the transferring of units from one order of theregister to the next higher order thereof, in the orders higher than the12th the machine is provided with an auxiliary transfer mechanism shownand described in the Machado patent above mentioned. This mechanismbriefly comprises a single tooth transfer gear 50 rigidly mounted on thedial shaft 15 in the 12th order of the register, and a unitary transfertooth and gear assembly for the 13th and all higher order dial shafts15. These assemblies include the single tooth gear 50 and a lO-toothgear 53 formed on a single hub 55 which is afiixed to the dial shaft 15.As explained in said patent, in order to conserve space, the gear 53 isplaced above the single tooth gear 50 in alternate orders and in theothers the single tooth gear is placed above the lO-tOoth gear 53. Thesingle tooth gears 50 are adapted to engage the teeth of a -toothcoupling gear 51 mounted on a spindle 52 mounted in the forward side ofthe carriage frame bar. Thus, whenever the dial passes between the 9 and0 positions, the single tooth of the single tooth gear 50 meshes withthe teeth of coupling gear 51, giving it a single increment of rotation.The coupling gear 51 in turn meshes with the gear 53 on the next higherorder dial shaft 15, whereby rotation of the coupling gear 51 effects asimilar rotation of the next higher order dial shaft. Thus, a transferbetween one order and the next is accomplished through the single toothgear 50, coupling gear 51 and driven gear 53 on the next higher order.It is explained in said patent that the gears 51 and 53 are ofsufficient width to enable the gear 51 to mesh with the driving gear 50in one order and the driven gear 53 in the next higher order. Normally,the coupling gear 51 is biased into the plane of both the driven and thedriving gears of the register, but are held in a disengaged position bymeans of a comb 54 in all operations of the machine except whereoperation of the auxiliary tens-transfer mechanism is necessary. Thiscontrol is desirable in the commercial calculating machine, but as it ishas no effect upon the operation of my invention, a description thereofwill be omitted.

Each of the register assemblies including the shaft and gear 16 isprovided with a conventional detent means for centralizing each of theassemblies in a full digital position. The mechanism shown in Fig. 2,comprises a star wheel 60 fixedly mounted on the shaft 15, thedepressions of which are engaged by a resiliently biased ball 61 urgedinto engagement with the periphery of the star wheel by a suitablespring 62, the ball and spring being seated in a bore 63 formed in theframe bar 11.

In the mechanism shown in Figs. 1 and 2, values are set into theselection mechanism (not shown), after which a cyclically operatedactuating mechanism (not shown) is effective to differentially rotate asquare shaft a differential amount determined by the setting of theselection mechanism. Rotation of the square shaft 20 rotates adigitation control spool 21 slidably but nonrotatably mounted thereon soas to control digitation into the accumulator register through operationof gear 16 and shaft 15. Such a selection and actuating mechanism as isreferred to herein, is fully shown and described in the Friden andMachado patents above-referred to and, as they form no part of thepresent invention, it has been deemed unnecessary to show and describethem here. It should sufiice to mention that the spool 21 can be shiftedlongitudinally of its shaft 20 so as to cause meshing of a plus gear 22or a minus gear 23 thereon with an accumulator gear 16, as is more fullyshown and described in said patents. The spool 21 is selectivelypositioned by means of a gear, or bail, 25 which is mounted on a pair ofarms 26 which are rigidly secured to a transverse control shaft 27. Asexplained in said patents the rocking of shaft 27 causes either the plusgears 22 or minus gears 23 to mesh with the accumulator gear 16, andthus to control digitation additively or subtractively at the will ofthe operator. Normally the shaft 27 terminates at the left-hand frameplate 28, which supports the left-hand side of the selection andactuating mechanism.

In my present invention I extend the control shaft 27 to the left sothat the extreme left-hand end thereof is journalled in the controlplate 29 at the extreme lefthand side of the machine. In the Fridenmachine with which my invention is particularly adapted to beassociated, the 16th order of the register carriage lies immediately tothe right of this plate when the carriage is in the extreme left-handposition. Rigidly secured to the shaft 27, adjacent the control plate29, and in alignment with the 16th order of the register (when theregister is in the extreme left-hand position), I provide an arm (seeFig. 2) which is rigidly secured to the shaft 27. This arm 100 issimilar in size and length to the digitation control arms 26 previouslymentioned. The upper end of the arm 100 is provided with a short bail101 which is in alignment with the normal digitation control bail 25. Ialso provide a short square shaft 102 whose longitudinal axis is inalignment with the 16th order register wheel, the rear end of the shaftbeing rotatably journalled in the back plate 30 which normallyterminates at the frame plate 28, but which in my invention is extendedto the auxiliary or control plate 29, and in a bracket 103 which ismounted on the left-hand control plate 29. A digitation control spool21, similar in all respects to the digitation control spools previouslymentioned, is slidably mounted on the square shaft 102, the plus gear 22and minus gear 23 thereon straddling the short gate 101. Thus, when theshaft 27 is rocked to control digitation in the inboard orders of themachine, by means of rocking the conventional gate 25, the short gate101 is also rocked so that the digitation control spool 21 (in whatwould be the 16th order of the machine) is rocked into engagement withthe superimposed accumulator gear in all respects the same as the spools21 on the driving shafts 20. Then, when a transfer is effected by theauxiliary transfer mechanism of the said Machado patent, the 16th orderaccumulator gear will rotate the digitation control spool of that orderas the transfer goes through that order.

It can be noted that the greatest trouble in the auxiliary tens-transferabove-mentioned, lies in the overthrow of gears in the gear train as aresult of the sharp rotation of the 13th order register dials, and allhigher register dials in which a transfer will occur, upon the operationof the tens-transfer mechanism from the 12th order dial. Therefore, inmost instances a satisfactory auxiliary tenstransfer mechanism can besecured by means which positively limit the rotation of the 16th orderdial to 36, or A of a revolution, which corresponds to a transfer of avalueof 1. In some instances it may be that inaccuracies in the geartrain will cause a transfer to be lost, and in that case I provide ameans for forcibly pushing the transfer the full 36 once it is started,and mechanism for that purpose is shown in Fig. 4, which illustrates thesecond embodiment of my invention. For the moment however, we willreferto the means for blocking overthrow in the 16th order of the registerdials.

A stop arm 110 is mounted on the square shaft 102 immediately to therear of the auxiliary spool 21 that is slidably mounted on the shaft, asshown particularly in Fig. 3. The arm 110 is biased downwardly(counterclockwise in Fig. 3) by means of a suitable spring 111 tensionedbetween a stud 113 on the stop arm 110 and a stud 114 on the rear frameplate 30. The stop arm 110 abuts against a stop pin 112 which can bemade adjustable as shown in Fig. 4, but which is shown in Fig. 3 as afixed stop. It will be obvious that as the spool 21 on shaft 102 istranslated forwardly or rearwardly in synchronism with the digitationspools 21 on the inboard orders of the machine, the spool on shaft 102will engage with the aligned accumulator gear (in the 16th order of themachine as shown in the drawings) and the spool will therefore berotated by the accumulator gear whenever a tens-transfer goes throughthat gear. Rotation of the spool is limited to of a revolution, or 36,by means of an adjustable stop screw. 115 mounted in a bracket 116 onthe rear frame plate 30. The engagement of the stop arm 110 with the endof the adjustable stop screw 115 therefore stops rotation of the spool21, and consequently of the aligned accumulator gear, after arevolution. This prevents an overthrow in the 16th order register dial.Thi not only prevents overthrow in the orders below the 16th, but alsoprevents overthrow in orders above the 16th amounting to more than avalue of 1. i

Thus, by means of the form shown in Figs. 1 to 3, my invention preventsoverthrow in an intermediate outboard order, preferably about the 16thorder, and thereby prevents an error arising from overthrow in theorders to the left thereof. It should be remembered that in the machineof said patents the actuators and the square shafts always rotate in asingle direction (clockwise in Fig. 3). Therefore the stop arm 110 canbe biased against stop pin 112 and rotatable to engage stop pin 115',and will be effective in both addition and subtraction.

In some occasions it is desirable to modify the stop arm by providingpower-operated means for forcing it, and consequently the shaft 102 andspool 21 mounted thereon, to the full 36 rotation when a transfer intothe selected order is initiated. This form provides poweroperated meansfor rocking the stop arm and its associated spool positively for 36 andthere stopping rotation, thus driving the aligned register dial to afull step in a transfer operation, but limiting rotation to that stepand blocking overthrow as in the previous form. The mechanism preferredfor this power operation is shown in Fig. 4.

in the power-operated form shown in Fig. 4, the stop arm comprises abellcrank 130 rigidly mounted on the shaft 102, to the rear of the spool21 mounted on that shaft. The bellcrank is biased, as was true of thestop arm 110, by spring 111 tensioned between a stud 113 on thebellcrank and a stud 114 on the back plate 30. Clockwise rotation of thebellcranl; is limited by the adjustable stop 115 mounted in bracket 116and counterclockwise rotation is blocked by .an adjustable stop member132 which comprises a block with a slot 139 embracing a screw 138affixed to the back plate 30. Thus, the stops-115 and 132 can be readilyadjusted so as to provide for a full 36 of rotation of the bellcrank134) and limited strictly to such 36 of rotation.

The other arm of the bellcrank 134) is equipped with a roller 137, whichengages the leftwardly extending 6 means, such as screw146; and isprovided'with an arcuate upper surface 144 land a cam face 143' on theouter end thereof. The rightwardly extending arm 145 of the bellcrank141 is pivotally secured to a link 147 by any suitable means, such aspin 153. The right end of the link 147 is pivotally supported by afollower arm 148, to which it is pivotally mounted by pin 154. The arm148 is mounted on the rear plate 30 by any suitable means such as screw152. The follower arm is provided with a follower roller 150 which isadapted to engage the periphery of a single rise cam 151 mounted on theactuator drive shaft 31 which serves the 11th and 12th orders of themachine. The arm 148 is biased (counterclockwise in Fig. 4) intoengagement with cam arm 142 of a bellcrank 141. The bellcrank 141 ispiv- I otally mounted on the rear plate 30 by any suitable 151 by atension spring 149 tensioned between a stud 155 on the arm and a stud156 on the back plate 30. The spring 149 is relatively strong so as toovercome the force of spring 111, the spring 149 biasing the arm 148toward the left and urging the bellcrank 141 in a clockwise direction.However, the arcuate edge 144 of the arm 142 is so designed that theforce of spring 149 biasing the bellcrank 141 in a clockwise direction,is blocked by the roller 137 on the bellcrank 130 in all normalconditions of the register. When a transfer goes through the auxiliarymechanism mentioned to initiate a transfer into the 16th order, withconsequent rotation of the spool 21 and shaft 102 from the latchedposition shown, 'bellcrank 130 is also rocked slightly (clockwise inFig. 4). Thereupon the roller 137 passes from the blocking face 144 andinto engagement with the cam face 143 on arm 142. When this occursrotation of the bellcrank 141 is no longer blocked and the bias ofspring 149 will therefore rock the bellcranks 141 and 130 to theirfullest extent, which is limited by engagement of the stop pin engagingthe arm of bellcrank 130. Such rocking of bellcrank 141, from the forceof spring 149, causes the cam face 143 to force the bellcrank for itsfull stroke (clockwise in Fig. 4), thereby guaranteeing that therotation of shaft 102, the sleeve 21 mounted thereon and the alignedaccumulator gear will be a full 36. This mechanism thus provides apositive means for forcing the booster sleeve 21 to its full carryrotation of 36 while positively blocking overthrow in this order. Such apower-operated booster prevents a carry from being lost due to frictionin any of the parts and looselyfitting gears and likewise positivelyprevents overthrow resulting from the normal rapid rotation of theauxiliary transfer mechanism.

In its preferred form my invention comprises a power driven booster foran intermediate outboard order of the register, preferably about the16th, which is operative to drive that register a full step to enter avalue of 1, when the auxiliary transfer mechanism moves that registerdial from its full-cycle position; and is eifectiveto block rotation toprevent overthrow and thus limit the carry to a value of 1. This boosterprevents a carry from being lost and also prevents error due tooverthrow in the parts accumulating to throw more than a value of 1 inthe highest order of the register. In my first described form I providemerely a block for preventing overthrow, as it has been found that thisnormally is the cause of errors in the auxiliary transfer mechanismmentioned.

it will be understood that the mechanisms shown and described herein arepreferred embodiments of my .invention and that the mechanisms shown arecapable of considerable modification by persons skilled in the artwithout departing from the spirit and scope of this invention.

I claim:

1. In combination with a calculating machine having a frame, a shiftablecarriage, a plurality of ordinally arranged register wheels in saidcarriage, certain of said wheels lying inboard of said frame and othersof said Wheels lying outboard thereof when the carriage is in its endposition, a main transfer mechanism for effecting transfers in theinboard register Wheels, an auxiliary trans fer mechanism mounted onsaid carriage for effecting transfers in the outboard register wheels,and a detent means for centralizing each one of said outboard registerwheels in a full digital position, a normally disengaged stopping meansmounted in said frame and engageable with an intermediate one of saidoutboard register wheels, and means for engaging said stopping meanswith an aligned register wheel during operation of the auxiliarytransfer means.

2. In a calculating machine having a frame, an ordinally arranged anddifferentially operable actuating means mounted in said frame, ashiftable carriage, a plurality of ordinally arranged register wheels insaid carriage, certain of said wheels lying inboard of said frame andothers of said wheels lying outboard thereof when the carriage is in itsend position, means for engaging said actuating means with the alignedregister wheels, a main transfer mechanism for effecting transfers inthe inboard register wheels, and an auxiliary transfer mechanism mountedon said carriage for effecting transfers in the outboard registerwheels, the combination which comprises a normally disengaged stopmember associated with an intermediate one of said outboard registerwheels adapted to block operation of said wheel against rotation greaterthan a value of l, and means operated simultaneously with said engagingmeans for connecting an ordinally aligned register wheel to said stopmember.

3. In a calculating machine having a frame, a shiftable carriage, aplurality of ordinally arranged register wheels in said carriage,certain of said wheels lying inboard of said frame and others of saidwheels lying outboard thereof when the carriage is in its end position,a main transfer mechanism for effecting transfers in the inboardregister wheels, and an auxiliary transfer mechanism mounted on saidcarriage for effecting transfers in the outboard register wheels, :1means mounted in said frame and operative in an intermediate outboardorder for blocking rotation of the register wheel in said outboard orderto an amount greater than a value of 1.

4. In a calculating machine having a frame, a shiftable carriage, aplurality of ordinally arranged register wheels in said carriage,certain of said wheels lying inboard of said frame and others of saidwheels lying outboard thereof when the carriage is in its end position,means for entering values into said inboard register wheels includingdigitation control gears cooperative with certain inboard registerwheels and control means for selectively engaging said gears with theordinally related register wheels, :1 main tens-transfer mechanism foreffecting transfers in the inboard register wheels. and an auxiliarytens-transfer mechanism mounted on said carriage for effecting transfersin the outboard register wheels, said last-named means including atransfer tooth connected for movement with the highest order inboardwheel and each of the outboard wheels, a transfer gear on each of theoutboard wheels, and a series of coupling members for operativelyconnecting each transfer tooth with the transfer gear in the neXt higherorder of the register so as to enable the transfer of a unit from oneorder to the next to be effected throughout the entire array of registerwheels. an outboard control gear cooperating with a selectedintermediate outboard order wheel, means for engaging said outboardcontrol gear with the ordinally related register wheel synchronouslywith the operation of the control means, and means for limiting theextent of rotation of said outboard control gear.

5. In a calculating machine having a frame, a shiftable carriage, aplurality of ordinally arranged register wheels in said carriage,certain of said wheels lying inboard of said frame and others of saidWheels lying outboard thereof when the carriage is in its end position,engageable actuators for certain of said inboard register wheels. meansfor engaging said actuators with said inboard register wheels, a maintransfer mechanism for effecting transfers in the inboard registerwheels, an auxiliary transfer mechanism mounted in said carriage foreffecting transfers in the outboard register wheels, and means forpositively entering a value of 1 into an intermediate outboard order ofsaid register comprising an actuator member in said intermediateoutboard order, power means for operating said actuator, means forlatching said power means against operation, stop means for limitingoperation of said actuator to a value of 1, means for moving saidactuator member into engagement with the ordinally aligned registersimultaneously with operation of the engaging means, and means operatedby rotation of said outboard register wheel for releasing said latchingmeans.

6. in a calculating machine having ordinally arranged and differentiallyoperable drive means, a shiftable carriage, a plurality of ordinallyarranged register wheels in said carriage, certain of said wheels lyinginboard of said drive means and others of said wheels lying outboardthereof when the carriage is in its end position, means for engagingsaid drive means with the ordinally aligned register wheels, a maintransfer mechanism for effecting transfers in the inboard registerwheels, and an auxiliary transfer mechanism mounted in said carriage foreffecting transfers in the outboard register wheels, means for limitingoverthrow in an intermediate outboard order of said register comprisingan actuator member in said intermediate outboard order, means for movingsaid actuator member into engagement with the ordinally aligned registersimultaneously with operation of the engaging means and stop means forlimiting rotation of said actuator member to a value of l.

7. In a calculating machine having ordinally arranged and differentiallyoperable actuating means, a shiftable carriage, a plurality of ordinallyarranged register wheels in said carriage, certain of said wheels lyinginboard of said actuating means and others of said wheels lying outboardthereof when the carriage is in its end position, a main transfermechanism for effecting transfers in the inboard register wheels, and anauxiliary transfer mechanism mounted in said carriage for effectingtransfers in the outboard register wheels, the combination whichcomprises a booster member engageable with an intermediate outboardorder of said register, means for engaging said booster with an alignedregister wheel, power means for rotating said booster, means forlimiting such rotation to the entry of a single value, means forlatching said power means against operation, means for releasing saidlatching means whenever the aligned dial is rocked as a result of atransfer.

8. In a calculating machine having ordinally arranged and differentiallyoperable drive means, a shiftable carriage, a plurality of ordinallyarranged register wheels in said carriage, certain of said wheels lyinginboard of said drive means and others of said wheels lying outboardthereof when the carriage is in its end position, a main transfermechanism for effecting transfers in the inboard register wheels, and anauxiliary transfer mechanism mounted on said carriage for effectingtransfers in the outboard register wheels, a power-operated actuatorcooperating with a predetermined intermediate order of said outboardregister wheels, latching means for said actuator, and means operated bya partial rotation of said intermediate order register wheel fordisabling said latching means.

References Cited in the file of this patent UNITED STATES PATENTS1,594,749 Odhner Aug. 3, 1926 2,597,463 Ellerbeck May 20, 1952 2,597,487Hopkins May 20, 1952 2,597,488 Hopkins May 20, 1952 2,597,507 MachadoMay 20, 1952

